holroyd



2 Sheets-Sheet 1.

(No Model.)

J. HOLROYD.

STOP MOTION MECHANISM FOR DOUBLING MACHINES. No. 349,939.

Patented Sept. 28, 1886.

WM W Z (No Model.) 2 Sheets-Sheet 2.

J. HOLROYD.

.s'ror MOTION MECHANISM FOR DOUBLING MACHINES. No. 349,939. Patented Sept. 28, 1886.

F l G 3.

I I W. l fia N W 5L Mamba UNITED STATES JAMES HOLROYD, OF MANCHESTER,

PATENT FTCE.

COUNTY OF LANCASTER, ENGLAND.

STOP-MOTION MECHANISM FOR DOUBLINGF-MACHINES.

SPECIFTCATION forming part of Letters Patent No. 349,939, dated September 28, 1886.

Application filed December 12, 1885. Serial No. 185.491. (No model.) Patented in England October 27, 1835, No. 12,863.

To all whom it may concern.-

Be it known that I, JAMES HOLROYD, a subject of the Queen of Great Britain, and residing at Manchester, in the county of Lancaster, England, have invented an Improved Stop Motion Mechanism for Doubling Machines, (for which I have applied for a patent in Great Britain, dated October 27, 1885, No. 12,863,) of which the following is a specification.

This invention is designed to prevent the waste of fibrous material (commonly called roller-laps) arising from the accumulation of such material upon the delivery-rollers of doubling-frames when the ends break or the thread or twist becomes slack. It also prevents the occurrence of the defect known as fourfold.

The invention relates to that class of stopmotions for such machines wherein a series of small balanced levers are employed, the lower or heavier end of the lever being supported by the thread, and the lighter or upper end carrying a swing plate or wedge which, when the end breaks or becomes slack, is thrust forward by the falling of the lower end of the balanced lever,and coming between the delivery-rollers raises the top roller off the bottom or driving roller, and thus stops the delivery of the yarn or thread of fibrous material.

The nature of my invention and the manner in which it is practically applied will be readily understood on reference to the annexed sheet of drawings and the following explanation thereof.

Figure l on the drawings is a section of the roller-beam and delivery-rollers and cap-bar of a doubling-frame, showing the application of my improved stop-motion thereto, the balanced lever being shown as supported by the yarn or thread in the position which it would occupy when the machine is in work,and Fig. 2 is a similar view showing the position which it assumes when an end or thread breaks or becomes slack.. Fig. 3 is a back view of the cap-bar. Figs. 4 and 5 are enlarged views of one of my improved balanced levers, shown detached.

a a is the roller-beam of a doubling-frame; b I), one of the roller-stands; 0 0, two of the delivery-rollers, (the lower roller, 0, being the which the frame is to be employed.

driver.) dd is the cap-bar, and d d the caps or curved brackets which support the top delivery-rollers, 0. e e are the balanced levers.

My invention consists of an improved mode of constructing and mounting such balanced levers, whereby their eliiciency is increased, the access of fluff or dust to their bearings is prevented, and means are afforded for removing any one or more of such levers without disturbing the rest.

The balanced levers are made of wire, in the form of a bell-crank. The lower arm, 0, of the lever projects below the bottom roller, 0, and its forward end is bent at right angles and then slightly hooked backward, so as to form a kind of guide, f, for the thread orend which supports it. The lower arm of the balanced lever is also made with an open ring or bend, e, to increase its weight, and this ring is made either larger or smaller to suit the strength or count of the yarn for doubling The central portion of the wire is coiled into two or more turns at g g, and embraces tightly the center of a short piece, it h, of wire at right angles to itself, (see Figs. 4c and 5,) which forms two pivots upon which the balanced lever is supported. These coils are preferably also further secured to the pins h h by means of solder. The upper arm, 6, of the lever extends backward, and is bent upward behind the cap-bar d d, which supports the top delivery-roller, c, and its upper end is bent at right angles horizontally and carries the swing plat-e or wedge i i, the forward end of which (when theframe is in action) rests upon the top of the cap-bar d d, just behind the two rollers, as shown at Fig. 1.

The crosswires or pivots h h of the balanced levers e c are supported beneath the cap-bar d d in the following manner: To the front of the cap-bar (l d, I soldcr,pin, screw,or otherwise affix a series of thin metal plates, 70, (one beneath each cap d d,)having spaccsll between them(see Fig. 3) of a sufficient width to admit of the coiled central part, 9 g, of the balanced lever. Each plate 7; It extends downward as far as required, and is then doubled upward, (see Figs. 1 and 2,) so as to form a loop or support for the cross wires or pivots h h of the balanced levers to rest in. The free end of the plate]; does not reach up to the low- 2 3&92939 er side of the cap-bar d d, but a space, m m

ed to adjoining hangers," anda's'i'nglepice of wire bent at its lower end for the thread-guide coiled near that'end to give it Weight, coiled to embrace and hold fast the pivot-pin; and

carrying at its upper end the stop-plate, substantially as specified.

2. The combination of the rollers c c and cap-bar d with a series of stop-motion levers,

pivots and stop-plates carried by the levers,

and hangers is, each consisting of a bent. plate sec'nred to the cap-bar and open atm for the free removal of any of the levers, substantially as set forth.

Intestimony whereof I have signed my name to this specification in the presence of two subscribing-witnesses.

JAMES HOLROYD.

Witnesses:

CHARLES S. DAVIES, J NO. HUGHES. 

